PREHEAT oven to 350° F. Grease a 13 x 9-inch baking pan.
BEAT flour, butter and brown sugar in a small mixing bowl until crumbly. Press onto bottom of prepared baking pan.
BAKE for 12 to 15 minutes or until lightly browned.
BEAT eggs, corn syrup, granulated sugar, butter and vanilla extract in a large mixing bowl. Stir in morsels and nuts; pour over hot crust.
BAKE for 25 to 30 minutes or until set. Cool completely in pan on wire rack.